CALLING ALL CASSANDRA USERS - The Community would love to hear from you!

Are you using Cassandra in production today? Is your organisation building an app with Cassandra as the backend? Is your organisation evaluating or building a POC on Cassandra? If you answered yes to ANY of the questions above, we want to hear from you! The Cassandra Community is always interested

Interview opportunity for Cassandra users

Hello everyone, My name is Chris, and I provide content support for the Apache Cassandra project. As part of Apache Cassandra's ongoing content marketing, I'd like to give Cassandra users the opportunity to participate in a little interview series called 'Inside Cassandra&

Re: Five Questions for Cassandra Users

Hello, I'm no longer operating "my" own cluster, but now doing consulting for TLP. Here is what is would say with my own experience: 1. Do the same people where you work operate the cluster and write > the code to develop the application? > It's not the same set of skills that is required

Re: Five Questions for Cassandra Users

Answers inline. 1. Do the same people where you work operate the cluster and write the code to develop the application? No but the operators need to know development , data-modeling, and generally how to "code" the application. (Coding is a low-level task of assigning a code to a concept.

RE: Five Questions for Cassandra Users

Yes, absolutely! From: Jonathan Koppenhofer [mailto:j...@koppedomain.com] Sent: Thursday, March 28, 2019 1:18 PM To: user@cassandra.apache.org Subject: Re: Five Questions for Cassandra Users I think it would also be interesting to hear how people are handling automation (which to me is

Re: Five Questions for Cassandra Users

I think it would also be interesting to hear how people are handling automation (which to me is different than AI) and config management. For us it is a combo of custom Java workflows and Saltstack. On Thu, Mar 28, 2019, 5:03 AM Kenneth Brotman wrote: > I’m looking to get a better feel for how

Re: Five Questions for Cassandra Users

1. PaaS model. We have a team responsible for the deployment and self-service tooling, as well as SME for both development and Cassandra operations. End users consume the service, and are responsible for app development and operations. Larger apps have separate teams for this, smaller apps have a s

Re: Five Questions for Cassandra Users

1. Do the same people where you work operate the cluster and write the code to develop the application? Mostly. Ops vs dev, although there's some overlap 2. Do you have a metrics stack that allows you to see graphs of various metrics with all the nodes displayed together? Yes, Prom

Re: Five Questions for Cassandra Users

1. Do the same people where you work operate the cluster and write the code to develop the application? No, we have a small infrastructure team, and many people developing applications using Cassandra 2. Do you have a metrics stack that allows you to see graphs of various metrics with

Re: Five Questions for Cassandra Users

1. Do the same people where you work operate the cluster and write the code to develop the application? yes 2. Do you have a metrics stack that allows you to see graphs of various metrics with all the nodes displayed together? no 3. Do you have a log stack that allows you to

Re: Five Questions for Cassandra Users

1. Do the same people where you work operate the cluster and write the code to develop the application? Different teams. Infra separate , Dev separate. 2. Do you have a metrics stack that allows you to see graphs of various metrics with all the nodes displayed together?

Five Questions for Cassandra Users

I'm looking to get a better feel for how people use Cassandra in practice. I thought others would benefit as well so may I ask you the following five questions: 1. Do the same people where you work operate the cluster and write the code to develop the application? 2. Do you have

Databasde connections based Cassandra users

Is there a way to see who is connected to Cassandra based on a Cassandra user?

Re: Cassandra users survey

Thanks for all the responses! The results (minus suggestions and emails) are available here: https://docs.google.com/spreadsheets/d/1FegCArZgj2DNAjNkcXi1n2Y1Kfvf6cdZedkMPYQdvC0/edit?usp=sharing I've included charts on separate sheets for each question, but unfortunately I couldn't figure out how

Re: Cassandra users survey

I think what would be most useful would be to pick your largest cluster, and answer based on that. If you have multiple applications in the cluster, then the sum; otherwise, just one. On Thu, Oct 1, 2015 at 9:50 PM, Jim Ancona wrote: > Hi Jonathan, > > The survey asks about "your application."

Re: Cassandra users survey

Hi Jonathan, The survey asks about "your application." We have multiple applications using Cassandra. Are you looking for information about each application separately, or the sum of all of them? Jim On Wed, Sep 30, 2015 at 2:18 PM, Jonathan Ellis wrote: > With 3.0 approaching, the Apache Cass

Cassandra users survey

With 3.0 approaching, the Apache Cassandra team would appreciate your feedback as we work on the project roadmap for future releases. I've put together a brief survey here: https://docs.google.com/forms/d/1TEG0umQAmiH3RXjNYdzNrKoBCl1x7zurMroMzAFeG2Y/viewform?usp=send_form Please take a few minute

Re: Restrict Cassandra users seeing all keyspaces

Hi Mikhail, Thank you for pointing out. It is helpful. Thanks, Bhathiya On Fri, Nov 8, 2013 at 1:18 PM, Mikhail Stepura wrote: > Please take a look at https://issues.apache.org/jira/browse/CASSANDRA-6266for > details > > -M > > "Bhathiya Jayasekara" wrote in message > news:capt+24qd4e_+_6oc

Re: Restrict Cassandra users seeing all keyspaces

Please take a look at https://issues.apache.org/jira/browse/CASSANDRA-6266 for details -M "Bhathiya Jayasekara" wrote in message news:capt+24qd4e_+_6oc3rrmzpq2c6yoij1yqydlkcepngabxk_...@mail.gmail.com... Hi all, If I understood correctly, in Cassandra, authenticated users can see the list

Restrict Cassandra users seeing all keyspaces

Hi all, If I understood correctly, in Cassandra, authenticated users can see the list of all keyspaces. (i.e. full schema) Is that the default behavior in Cassandra? Can we restrict that behavior? Thanks, Bhathiya

Re: Second Cassandra users survey

PM, Jonathan Ellis wrote: Hi all, Two years ago I asked for Cassandra use cases and feature requests. [1] The results [2] have been extremely useful in setting and prioritizing goals for Cassandra development. But with the release of 1.0 we've accomplished basically everything from our or

Re: Second Cassandra users survey

Ability to mix counter columns & normal columns in same column family. On Thu, Nov 17, 2011 at 6:46 PM, Boris Yen wrote: > I was wondering if it is possible to provide a funtion like "delete from > cf where column='value' " > > I think this shold be useful for people who use secondary index a

Re: Second Cassandra users survey

I was wondering if it is possible to provide a funtion like "delete from cf where column='value' " I think this shold be useful for people who use secondary index a lot. On Nov 15, 2011 11:05 AM, "Edward Ribeiro" wrote: > > +1 on co-processors. > > > Edward

Re: Second Cassandra users survey

+1 on co-processors. Edward

Re: Second Cassandra users survey

per. >> >> >> >> On 11/01/2011 06:59 PM, Jonathan Ellis wrote: >> >> > Hi all, >> >> > >> >> > Two years ago I asked for Cassandra use cases and feature requests. >> >> > [1] The results [2] have been extremely

Re: Second Cassandra users survey

te: > >> > Hi all, > >> > > >> > Two years ago I asked for Cassandra use cases and feature requests. > >> > [1] The results [2] have been extremely useful in setting and > >> > prioritizing goals for Cassandra development. But with

Re: Second Cassandra users survey

t; >> On 11/01/2011 06:59 PM, Jonathan Ellis wrote: >> > Hi all, >> > >> > Two years ago I asked for Cassandra use cases and feature requests. >> > [1]  The results [2] have been extremely useful in setting and >> > prioritizing goals for Cassandra de

Re: Second Cassandra users survey

ls for Cassandra development. But with the release of > > 1.0 we've accomplished basically everything from our original wish > > list. [3] > > > > I'd love to hear from modern Cassandra users again, especially if > > you're usually a quiet lurker. What do

Re: Second Cassandra users survey

for Cassandra development. But with the release of > 1.0 we've accomplished basically everything from our original wish > list. [3] > > I'd love to hear from modern Cassandra users again, especially if > you're usually a quiet lurker. What does Cassandra do well? What

Re: Second Cassandra users survey

[1] The results [2] have been extremely useful in setting and >> prioritizing goals for Cassandra development. But with the release of >> 1.0 we've accomplished basically everything from our original wish >> list. [3] >> >> I'd love to hear from modern Cassandra users

Re: Second Cassandra users survey

Oh, and one more thing: If you're doing a select and you get no results, then an indication of no columns or no rows matching would be nice. Kinda painful when you're typing in long strings and get no result, wonder why, only to find out you fat fingered your row key. :( On Fri, Nov 11, 2011 at

Re: Second Cassandra users survey

Lately I've been working on some data processing code in Cassandra and apparently I don't write bug-free code the very first time. :) Hence, while debugging, I often need to look at data in Cassandra to see what my code is doing/should be finding, etc. This turns out to be harder then it should be

Re: Second Cassandra users survey

s for Cassandra development. But with the release of > 1.0 we've accomplished basically everything from our original wish > list. [3] > > I'd love to hear from modern Cassandra users again, especially if > you're usually a quiet lurker. What does Cassandra do wel

Re: Second Cassandra users survey

ence that had > already implemented what I mentioned. It didn't offer any atomicity, just > co-locating a family of data on the same node. > > From: Jake Luciani > Reply-To: "user@cassandra.apache.org" > Date: Wed, 9 Nov 2011 02:53:20 -0800 > To: "user@cassandr

Re: Second Cassandra users survey

.org<mailto:user@cassandra.apache.org>" mailto:user@cassandra.apache.org>> Date: Wed, 9 Nov 2011 02:53:20 -0800 To: "user@cassandra.apache.org<mailto:user@cassandra.apache.org>" mailto:user@cassandra.apache.org>> Subject: Re: Second Cassandra users survey Hi Todd,

Re: Second Cassandra users survey

setting and > prioritizing goals for Cassandra development.  But with the release of > 1.0 we've accomplished basically everything from our original wish > list. [3] > > I'd love to hear from modern Cassandra users again, especially if > you're usually a quiet lurker.  

Re: Second Cassandra users survey

gt;>> Sometimes a logical transaction requires writing rows with different > >>>>row keys. If we could use something like this: > >>>> > >>>> prefix.uniquekey and let the partitioner use only the prefix the > >>>>probability that only

Re: Second Cassandra users survey

A use case that could use this (but isn't in my top requests) is usage history for a given user. I use a single row to save history per user, each column is a user action with name a TimeUUID and value is a blob. I use the TimeUUID to sort the actions, but I don't really care about exact time. a

Re: Second Cassandra users survey

>>>> >>>> prefix.uniquekey and let the partitioner use only the prefix the >>>>probability that only part of the transaction would be written could >>>>be reduced considerably. >>>> >>>> >>>> >>>&g

Re: Second Cassandra users survey

y. >>> >>> >>> >>> On Nov 1, 2011, at 11:59 PM, Jonathan Ellis wrote: >>> >>>> Hi all, >>>> >>>> Two years ago I asked for Cassandra use cases and feature requests. >>>> [1] The results [2] have been

Re: Second Cassandra users survey

Decompression without compression (for lack of a better name). We store into Cassandra log batches that come in over http either uncompressed, deflate, snappy. We just add 'magic e.g. \0 \s \n \a \p \p \y as a prefix to the column value so we can decode it when serve it back up. Seems like Cassa

Re: Second Cassandra users survey

It should be dead-simple to build a slick GUI on the REST layer. (@Virgil ) I had planned to crank one out this week (using ExtJS) that mimicked the Squirrel/Toad look and feel. The UI would have a tree-panel of keyspaces and column families o

Re: Second Cassandra users survey

gt; Hi all, >>> >>> Two years ago I asked for Cassandra use cases and feature requests. >>> [1] The results [2] have been extremely useful in setting and >>> prioritizing goals for Cassandra development. But with the release of >>> 1.0 we've ac

Re: Second Cassandra users survey

> > > Wish list: A decent GUI to explore data kept in Cassandra would be much > valuable. It should also be extendable to > provide viewers for custom data. > > +1 to that. @jonathan - This is what google moderator is really good at. Perhaps start one and move the idea creation / voting there.

RE: Second Cassandra users survey

-Original Message- From: Mohit Anchlia [mailto:mohitanch...@gmail.com] Sent: Sunday, November 06, 2011 10:58 AM To: user@cassandra.apache.org Subject: Re: Second Cassandra users survey Transparent on disk encryption with pluggable keyprovider will also be really helpful to secure sensitive i

Re: Second Cassandra users survey

derably. >> >> >> >> On Nov 1, 2011, at 11:59 PM, Jonathan Ellis wrote: >> >>> Hi all, >>> >>> Two years ago I asked for Cassandra use cases and feature requests. >>> [1]  The results [2] have been extremely useful in setting

Re: Second Cassandra users survey

the release of 1.0 we've accomplished basically everything from our original wish list. [3] I'd love to hear from modern Cassandra users again, especially if you're usually a quiet lurker. What does Cassandra do well? What are your pain points? What's your feature wish list?

Re: Second Cassandra users survey

Actually, the data will be visible at QUORUM as well if you can see it with ONE. QUORUM actually gives you a higher chance of seeing the new value than ONE does. In the case of R=3 you have 2/3 chance of seeing the new value with QUORUM, with ONE you have 1/3... And this JIRA fixed an issue

Re: Second Cassandra users survey

> So my question related deterministic sharding is this, "what rebalance feature(s) would be useful or needed once the partitions get unbalanced?" In current cassandra you can use "nodetool move" for rebalancing. Its fast operation, portion of existing data is moved to new server.

Re: Second Cassandra users survey

] have been extremely useful in setting and prioritizing goals for Cassandra development. But with the release of 1.0 we've accomplished basically everything from our original wish list. [3] I'd love to hear from modern Cassandra users again, especially if you're usually a quiet lur

Re: Second Cassandra users survey

llis wrote: > >> Hi all, >> >> Two years ago I asked for Cassandra use cases and feature requests. >> [1]  The results [2] have been extremely useful in setting and >> prioritizing goals for Cassandra development.  But with the release of >> 1.0 we&#x

Re: Second Cassandra users survey

riginal wish > list. [3] > > I'd love to hear from modern Cassandra users again, especially if > you're usually a quiet lurker. What does Cassandra do well? What are > your pain points? What's your feature wish list? > > As before, if you're in stealth mode or

Re: Second Cassandra users survey

Take a look at this: http://www.oracle.com/technetwork/database/nosqldb/overview/index.html > I understand the limitation/advantages of the architecture. Read this http://en.wikipedia.org/wiki/CAP_theorem

RE: Second Cassandra users survey

ber 07, 2011 8:02 AM To: user@cassandra.apache.org Subject: Re: Second Cassandra users survey > Yeah, I can use HBase too. but why you are not using hbase if its feature set fits your needs better and want to have same functionality in cassandra? Its good that both projects are different in

Re: Second Cassandra users survey

Yeah, I can use HBase too. but why you are not using hbase if its feature set fits your needs better and want to have same functionality in cassandra? Its good that both projects are different in this area. From rest of your post it looks like you want to have cassandra ACID compliant, which i

Re: Second Cassandra users survey

On Nov 6, 2011, at 3:41 PM, Ed Anuff wrote: > I'd like to see official support for Zookeeper inside of Cassandra. > I'd like it to be something that can be optionally configured. I'd > like to be able to make batch mutations atomic using it. Not sure how possible this is, but we are forced to u

Re: Second Cassandra users survey

On Sun, Nov 6, 2011 at 12:52 AM, Radim Kolar wrote: > - support for atomic operations or batches (if QUORUM fails, data should not > be visible with ONE) > zookeeper is solving that. I'd like to see official support for Zookeeper inside of Cassandra. I'd like it to be something that can be option

RE: Second Cassandra users survey

>>- support for atomic operations or batches (if QUORUM fails, data should not be visible with ONE) >zookeeper is solving that. Yeah, I can use HBase too. I might have screwed up a little bit since I didn't talk about isolation; let's reformulate: support for read committed (using DB terminolog

Re: Second Cassandra users survey

nd put". >> Did I miss something in my reading of intent? >> -Sarah >> >> -Original Message- >> From: Aaron Turner [mailto:synfina...@gmail.com] >> Sent: Sunday, November 06, 2011 8:25 AM >> To: user@cassandra.apache.org >> Subject: Re: Se

Re: Second Cassandra users survey

ed to leave such utilities external.  At its core was "get > and put". > Did I miss something in my reading of intent? > -Sarah > > -Original Message- > From: Aaron Turner [mailto:synfina...@gmail.com] > Sent: Sunday, November 06, 2011 8:25 AM > To: user@cass

RE: Second Cassandra users survey

omething in my reading of intent? -Sarah -Original Message- From: Aaron Turner [mailto:synfina...@gmail.com] Sent: Sunday, November 06, 2011 8:25 AM To: user@cassandra.apache.org Subject: Re: Second Cassandra users survey 1. Basic SQL-like summary transforms for both CQL and Thrift API c

Re: Second Cassandra users survey

1. Basic SQL-like summary transforms for both CQL and Thrift API clients like: SUM AVG MIN MAX 2. Native 64bit UNsigned datatype 3. Add support for matching column names via LIKE (% and _ wildcards) for ascii type -- Aaron Turner http://synfin.net/         Twitter: @synfinatic http://tcprep

Re: Second Cassandra users survey

- support for atomic operations or batches (if QUORUM fails, data should not be visible with ONE) zookeeper is solving that. - TTL on CF, rows and counters TTL on counters will be nice, but i am good with rest as it is

Re: Second Cassandra users survey

On Fri, Nov 4, 2011 at 9:50 PM, Jim Newsham wrote: > Our use case is time-series data (such as sampled sensor data).  Each row > describes a particular statistic over time, the column name is a time, and > the column value is the sample.  So it makes perfect sense to want to delete > columns for a

RE: Second Cassandra users survey

I missed something. - Pierre -Original Message- From: Jonathan Ellis [mailto:jbel...@gmail.com] Sent: mercredi 2 novembre 2011 00:00 To: user Subject: Second Cassandra users survey Hi all, Two years ago I asked for Cassandra use cases and feature requests. [1] The results [2] have been

Re: Second Cassandra users survey

On 11/4/2011 4:32 PM, Brandon Williams wrote: On Fri, Nov 4, 2011 at 9:19 PM, Jim Newsham wrote: - Bulk column deletion by (column name) range. Without this feature, we are forced to perform a range query and iterate over all of the columns, deleting them one by one (we do this in a batch, but

Re: Second Cassandra users survey

On Fri, Nov 4, 2011 at 9:19 PM, Jim Newsham wrote: > - Bulk column deletion by (column name) range.  Without this feature, we are > forced to perform a range query and iterate over all of the columns, > deleting them one by one (we do this in a batch, but it's still a very slow > approach).  See C

Re: Second Cassandra users survey

s [2] have been extremely useful in setting and prioritizing goals for Cassandra development. But with the release of 1.0 we've accomplished basically everything from our original wish list. [3] I'd love to hear from modern Cassandra users again, especially if you're usually a quiet lurker

Re: Second Cassandra users survey

we've accomplished basically everything from our original wish >list. [3] > >I'd love to hear from modern Cassandra users again, especially if >you're usually a quiet lurker. What does Cassandra do well? What are >your pain points? What's your feature wish lis

Re: Second Cassandra users survey

ng and >> prioritizing goals for Cassandra development.  But with the release of >> 1.0 we've accomplished basically everything from our original wish >> list. [3] >> >> I'd love to hear from modern Cassandra users again, especially if >> you're usua

Re: Second Cassandra users survey

The results [2] have been extremely useful in setting and > prioritizing goals for Cassandra development. But with the release of > 1.0 we've accomplished basically everything from our original wish > list. [3] > > I'd love to hear from modern Cassandra users again, e

Re: Second Cassandra users survey

To: user@cassandra.apache.org; Peter Tillotson Sent: Thursday, 3 November 2011, 14:15 Subject: Re: Second Cassandra users survey On Thu, Nov 3, 2011 at 5:46 AM, Peter Tillotson wrote: > I'm using Cassandra as a big graph database, loading large volumes of data > live and linking on the fl

Re: Second Cassandra users survey

Through GoldenOrb and Hadoop writables a managed to get both a BigTable and > Pregel access model onto my Cassandra data. It was schema specific, but > provided a local compute model. > p > ________ > From: Jonathan Ellis > To: user > Sent: Tuesday, 1 N

Re: Second Cassandra users survey

* Compaction is expensive Yes, it is. Thats why i deciced not to go with hadoop hdfs backed by cassandra.

Re: Second Cassandra users survey

pute model.  p  From: Jonathan Ellis To: user Sent: Tuesday, 1 November 2011, 22:59 Subject: Second Cassandra users survey Hi all, Two years ago I asked for Cassandra use cases and feature requests. [1]  The results [2] have been extremely useful in setting and prioritizing goals for Cassan

Re: Second Cassandra users survey

elopment. But with the release of > > 1.0 we've accomplished basically everything from our original wish > > list. [3] > > > > I'd love to hear from modern Cassandra users again, especially if > > you're usually a quiet lurker. What does Cassandra d

Re: Second Cassandra users survey

setting and > prioritizing goals for Cassandra development.  But with the release of > 1.0 we've accomplished basically everything from our original wish > list. [3] > > I'd love to hear from modern Cassandra users again, especially if > you're usually a quiet lu

Re: Second Cassandra users survey

we've accomplished basically everything from our original wish > list. [3] > > I'd love to hear from modern Cassandra users again, especially if > you're usually a quiet lurker.  What does Cassandra do well?  What are > your pain points?  What's your feature wish

Calling All Boston Cassandra Users

Hi All, Just a quick note to encourage those of you who are in the Greater Boston area to join: 1) The Boston subgroup of the Cassandra LinkedIn Group: http://www.linkedin.com/groups?home=&gid=3973913 2) The Boston Cassandra Meetup Group: http://www.meetup.com/Boston-Cassandra-Users The f

Re: Cassandra users meetup in Israel

gt; in the group. >>> Thanks, Shashank >>> >>> On Mon, Nov 1, 2010 at 3:17 AM, Ran Tavory wrote: >>>> >>>> http://cassandra-il.eventbrite.com/ >>>> >>>> Hi all, I'm organizing a users meetup in Israel, if you happen

Re: Cassandra users meetup in Israel

>> such a meetup? I would be happy to organize one if there is enough interest >> in the group. >> >> Thanks, Shashank >> >> >> On Mon, Nov 1, 2010 at 3:17 AM, Ran Tavory wrote: >> >>> http://cassandra-il.eventbrite.com/ >>> >&

Re: Cassandra users meetup in Israel

:17 AM, Ran Tavory wrote: > >> http://cassandra-il.eventbrite.com/ >> >> Hi all, I'm organizing a users meetup in Israel, if you happen to be >> around you're most welcome to join. >> >> Event Details: >> >> The first Cassandra users meetup in Isr

Re: Cassandra users meetup in Israel

7;m organizing a users meetup in Israel, if you happen to be > >> around > >> you're most welcome to join. > >> > >> Event Details: > >> > >> The first Cassandra users meetup in Israel will take place at outbrain, > >> Natanya on Tuesda

Re: Cassandra users meetup in Israel

Israel, if you happen to be >> around >> you're most welcome to join. >> >> Event Details: >> >> The first Cassandra users meetup in Israel will take place at outbrain, >> Natanya on Tuesday Nov 16th 4pm. >> >> Please register and get yourself

Re: Cassandra users meetup in Israel

Tavory wrote: > http://cassandra-il.eventbrite.com/ > > Hi all, I'm organizing a users meetup in Israel, if you happen to be around > you're most welcome to join. > > Event Details: > > The first Cassandra users meetup in Israel will take place at outbrain,

Cassandra users meetup in Israel

http://cassandra-il.eventbrite.com/ Hi all, I'm organizing a users meetup in Israel, if you happen to be around you're most welcome to join. Event Details: The first Cassandra users meetup in Israel will take place at outbrain, Natanya on Tuesday Nov 16th 4pm. Please register and ge

Cassandra Users

We started a Cassandra Users page on the Cassandra wiki - http://wiki.apache.org/cassandra/CassandraUsers - as the list of users is growing far beyond the ones people normally think about. Please take a look and update where necessary including company/organization name, description of use